There is a little glass dome on the flight deck of aircraft carriers, I've noticed one on the USS George Washington. What is it called and what is it for?
https://www.aopa.org/-/media/images/aopa-main/news-and-media/2016/june/ussgeorgewashington/0630_uss_george_washington_01/0630_uss_george_washington_01_16x9.jpg?mw=1200&mh=675&as=1&hash=1A2DBBCC28736D1E7608F8D48F0D798F1C803F23
there is picture if you don't know what I'm talking about